Playing around with Dialog Kit I've made a script to fill the most important fields in a font family at once in Fontlab. The program follows Karsten Lücke's recommendations about Font Metrics and Font Naming in his well known PDFs.
I'm sure several of you will point better methods or syntax :) so thanks a lot in advance. I will try to improve the interface and the script in the future, but for the moment, this is all I can do. Thanks to Tal Leming and Paul van der Laan for the help.
1- Open your fonts